CREATE OR REPLACE TRIGGER UPDATE_TEST_280510
AFTER insert on TEST_TRNCOMPVISIT
declare
V_TRNCOMPNO NUMBER(10);

CURSOR C1 IS SELECT B.COMPNO FROM TEST_TRNCOMPVISIT A, TEST_TRNCOMPMST B, 
                                  TEST_MEMMAST C
WHERE A.COMPNO=B.COMPNO 
AND B.TRNMEMID=C.MEMID 
AND C.MEMOS>=1000;

begin
open c1;
fetch c1 into V_TRNCOMPNO;


UPDATE TEST_TRNCOMPMST SET COMPSTATUS='P',
       remark='comp is pending due to O/S>1000'
WHERE COMPNO=V_TRNCOMPNO AND COMPSTATUS='C';
CLOSE C1;

end;

我做了这个触发器，在将行插入表TEST_TRNCOMPVISIT时，出现以下错误-

发生以下错误：

ORA-04091：表TEST.TEST_TRNCOMPVISIT正在变异，触发器/函数可能看不到它
ORA-06512：在“ TEST.UPDATE_TEST_280510”，第4行
ORA-06512：在“ TEST.UPDATE_TEST_280510”，第10行
ORA-04088：在执行期间出错执行触发器“ TEST.UPDATE_TEST_280510”